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--- textbook:nrctextbook:chapter11 [2025-04-24 14:01]
Merja Herzig
+++ textbook:nrctextbook:chapter11 [2025-04-24 14:07] (current)
Merja Herzig
@@ Line 96: / Line 96: @@
 {{anchor:tracer_alpha_spectrometry}}
 ###
-The [[textbook:nrctextbook:chapter6#activity|activity]] of an [[textbook:nrctextbook:chapter11#alpha_emitters|alpha-emitting radionuclide]] in an alpha spectrometric measurement following a radiochemical separation is typically determined by adding a tracer to the sample prior to the radiochemical separation. The tracer is another alpha-emitting radionuclide of the target radionuclide element. For all radionuclides given in [[textbook:nrctextbook:chapter11#alpha_emitters|Table XI.I]] except <sup>226</sup>Ra there is a suitable [[textbook:nrctextbook:chapter4#artificial_radionuclides|artificial]] alpha-emitting tracer. For example, when [[textbook:nrctextbook:chapter6#activity|activity]] of the [[textbook:nrctextbook:chapter6#long_lived_radionuclides|naturally occurring radionuclide]] <sup>210</sup>Po is determined in an environmental sample a known [[textbook:nrctextbook:chapter6#activity|activity]] amount of <sup>209</sup>Po (or <sup>208</sup>Po) is added to the sample at the start of the radiochemical separation procedure. <sup>209</sup>Po is an artificial radionuclide produced from <sup>209</sup>Bi in a cyclotron. Both isotopes of polonium behave identically in
+The [[textbook:nrctextbook:chapter6#activity|activity]] of an [[textbook:nrctextbook:chapter11#alpha_emitters|alpha-emitting radionuclide]] in an alpha spectrometric measurement following a radiochemical separation is typically determined by adding a tracer to the sample prior to the radiochemical separation. The tracer is another alpha-emitting radionuclide of the target radionuclide element. For all radionuclides given in [[textbook:nrctextbook:chapter11#alpha_emitters|Table XI.I]] except <sup>226</sup>Ra there is a suitable [[textbook:nrctextbook:chapter4#artificial_radionuclides|artificial]] alpha-emitting tracer. For example, when [[textbook:nrctextbook:chapter6#activity|activity]] of the [[textbook:nrctextbook:chapter6#long_lived_radionuclides|naturally occurring radionuclide]] <sup>210</sup>Po is determined in an environmental sample a known [[textbook:nrctextbook:chapter6#activity|activity]] amount of <sup>209</sup>Po (or <sup>208</sup>Po) is added to the sample at the start of the radiochemical separation procedure. <sup>209</sup>Po is an artificial radionuclide produced from <sup>209</sup>Bi in a [[textbook:nrctextbook:chapter11#cyclotrons|cyclotron]]. Both [[textbook:nrctextbook:chapter2#isotope|isotopes]] of polonium behave identically in
-the course of the separation procedure and the same fraction of both isotopes is recovered in the counting source. Due to their different alpha energies the two isotopes can be distinguished from alpha spectrum (Figure XI.5). The initial activity of <sup>210</sup>Po in the sample can now be simply calculated from the added activity of <sup>209</sup>Po and the number of counts, the peak areas. If, for example, 1.0 Bq of <sup>209</sup>Po was added and the peak areas were 7000 counts for <sup>210</sup>Po and 5000 counts for <sup>209</sup>Po the activity of <sup>210</sup>Po in the sample was $1 \, \text{Bq} \times \left( \frac{7000}{5000} \right) = 1.4 \, \text{Bq}$.
+the course of the separation procedure and the same fraction of both isotopes is recovered in the counting source. Due to their different alpha energies the two isotopes can be distinguished from alpha spectrum ([[textbook:nrctextbook:chapter11#alpha_spectrum|Figure XI.5]]). The initial [[textbook:nrctextbook:chapter6#activity|activity]] of <sup>210</sup>Po in the sample can now be simply calculated from the added activity of <sup>209</sup>Po and the number of counts, the peak areas. If, for example, 1.0 Bq of <sup>209</sup>Po was added and the peak areas were 7000 counts for <sup>210</sup>Po and 5000 counts for <sup>209</sup>Po the activity of <sup>210</sup>Po in the sample was $1 \, \text{Bq} \times \left( \frac{7000}{5000} \right) = 1.4 \, \text{Bq}$.
 ###

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